Malicious PDF — malware analysis report

Static analysis result for SHA-256 56292e7784a766fa…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 21:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3e8cea4cc2f05565cf4dcf216043d12a SHA-1: 391ba4e2ed3eccfc8c7014d8a202d9789fb6b1c8 SHA-256: 56292e7784a766fa0979112c4c41893155961899a42a5c6e863d0d3e8b87fe0a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a callback phishing or tech-support scam. It contains numerous links to potentially compromised websites and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests it is designed to lure users into making a phone call, likely for fraudulent purposes. No scripts were extracted, but the overall structure and heuristic firings point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/d9926bb178f98dfb5e9c9af912881a7b/15400099315.pdf In PDF document text
    • http://brilsports.ro/userfiles/file///9085621724.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/63953649887.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/zafidopijijaxemoduk.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/13931162852.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/tuwogi.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/gakabelulaw.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/28260039988.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/p7k93nomeq34101bvvk975dm96/28055751566.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091baecdfd1e---jokagebalimuwigefarux.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607797f47f011---dagax.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/87146564835.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vaxepifefosopajo.pdfIn PDF document text
    • https://laps.pl/userfiles/file/zefanogilawazunu.pdfIn PDF document text
    • http://exim5.hu/_user/file/89285259146.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/38991865157.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/davaganuj.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/rivabinotepowazen.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c9894942ef4ed771f65e5d2c7edefe9f/fuvafomozuzokibovuvapawob.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/sagiloxawezafolukeda.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0dee9aceb7---16754782845.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/9213701104.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a60a0f7075e---mobunedu.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7728ec8fd6---46555510495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=types+of+syllables+in+english+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 10796 bytes
SHA-256: b304cd66e6e93d15da80bd4dde31d11785c78c7582c8de77a394a16cdc1d8b82
font_01_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 17276 bytes
SHA-256: f9ab1462c941f4b7faa3d3f2f5166932c4f1d230bc84c4697d7fcf0ff9e9a359
font_02_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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